Brother MFC Series Service Manual page 88

■ Vertical stripes
Step
1
Foreign materials inside the
CR guide rail
2
Recording paper feeding path
contaminated
3
CR encoder strip stained
4
Carriage flat cable connection
failure
5
Ink supply tube not properly
attached
6
CR encoder strip defective
■ White vertical streak
Step
1
Foreign materials inside the
CR guide rail
2
CR encoder strip stained
3
Non-discharge of ink from
head
4
CR encoder strip defective
5
Carriage motor defective
6
Head defective
<User Check>
- Check if the recording paper used is according to
specifications.
- Clean each roller by printing several blank sheets.
- Clean the Platen.
Cause
Remove foreign materials.
Clean the recording paper feeding path.
Clean the CR encoder strip.
Reconnect the Carriage flat cable.
Reattach the Ink supply tube.
Replace the CR encoder strip.
<User Check>
- Carry out head cleaning.
Cause
Remove foreign materials.
Clean the CR encoder strip.
Carry out the recommended purge procedures.
Refer to "Recommended purge procedures" in
"Chapter 5, Section 1.4.26 "Purge Operation
(Maintenance mode 76)"
Replace the CR encoder strip.
Replace the Carriage motor ASSY.
Replace the Head/carriage unit.
2-56
Solution
Solution
Confidential